American Association of Physics Teachers
Com Padre Digital Library: Open Source Physics: Vector Addition Model
This Java applet simulation explores vector addition of two vectors in two dimensions. Given the magnitude and direction, students must determine the vector components.
Wolfram Research
Wolfram Math World: Math World: Vector Sum
Defines vector sum and expresses the notation using algebra. Includes links to sites with related information.
Other
Vector Sum
This site offers an interactive application to understand vector addition. The site exemplifies the ability to translate vectors to obtain a resultant.
Physics Classroom
The Physics Classroom:vectors/projectiles:vector Addition:order Does Not Matter
An animated illustration helps students understand that the summative result of two or more vectors can be determined by a process of vector addition.
Physics Classroom
The Physics Classroom: Motion and Forces in Two Dimensions: Vector Addition
In this physics tutorial, the task of summing vectors will be extended to cases in which the vectors are directed in directions other than purely vertical and horizontal.
Physics Classroom
The Physics Classroom: Vectors Motion and Forces in Two Dimensions: Resultants
This physics tutorial illustrates problems that show the vector sum of two or more vectors is the resultant.
CK-12 Foundation
Ck 12: Vector Addition
[Free Registration/Login may be required to access all resource tools.] Here you'll learn how to add two vectors with either the triangle method or the parallelogram method.
CK-12 Foundation
Ck 12: Resultant as Magnitude and Direction
[Free Registration/Login may be required to access all resource tools.] A collection of resources on how to express vectors in magnitude and direction form and determine the magnitude and direction of their sum.
Physics Classroom
The Physics Classroom: Vectors and Projectiles: Vector Addition: 6 + 8 = ?
Become a student of physics and approach the task of adding vector quantities, which also include direction. See this head-to-tail animation which helps with the visualization of this concept.
Khan Academy
Khan Academy: Add Vectors: Magnitude and Direction to Component
Add two vectors in magnitude and direction form to get a new vector in component form. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Wolfram Research
Wolfram Math World: Math World: Vector Addition
Defines vector addition and gives the algebraic notation for adding vectors. Includes a graphic and links to additional information.
Walter Fendt
Walter Fendt: Resultant of Forces (Addition of Vectors)
A short interactive activity which allows you to visualize the sum of vectors.